#include "headfiles.h"

using namespace std;

int main(int argc, char **argv) {
    if (argc != 2) {
        cout << "Usage: " << argv[0] << " num" << endl;
        return 0;
    }

    string str(argv[1]);
    bool res = isNumber(str.c_str());
    if (res) {
        cout << "Is a number" << endl;
    }
    else {
        cout << "Not a number" << endl;
    }

    return 0;
}
